diff --git a/package.json b/package.json
index 028771c6..a74a5402 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "@glimmer/tracking": "^1.0.4",
     "@primer/octicons": "^19.1.0",
     "broccoli-asset-rev": "^3.0.0",
-    "concurrently": "^8.2.2",
+    "concurrently": "^9.0.0",
     "ember-auto-import": "^2.7.4",
     "ember-cli": "~5.11.0",
     "ember-cli-clean-css": "^3.0.0",
diff --git a/yarn.lock b/yarn.lock
index bae7cbbb..c785dc2c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1024,7 +1024,7 @@
   dependencies:
     regenerator-runtime "^0.13.4"
 
-"@babel/runtime@^7.14.0", "@babel/runtime@^7.21.0", "@babel/runtime@^7.8.4":
+"@babel/runtime@^7.14.0", "@babel/runtime@^7.8.4":
   version "7.23.2"
   resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.23.2.tgz#062b0ac103261d68a966c4c7baf2ae3e62ec3885"
   integrity sha512-mM8eg4yl5D6i3lu2QKPuPH4FArvJ8KhTofbE7jwMUv9KX5mBvwPAqnV3MlyBNqdp9RyRKP6Yck8TrfYrPvX3bg==
@@ -3602,17 +3602,15 @@ concat-map@0.0.1:
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
   integrity sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==
 
-concurrently@^8.2.2:
-  version "8.2.2"
-  resolved "https://registry.yarnpkg.com/concurrently/-/concurrently-8.2.2.tgz#353141985c198cfa5e4a3ef90082c336b5851784"
-  integrity sha512-1dP4gpXFhei8IOtlXRE/T/4H88ElHgTiUzh71YUmtjTEHMSRS2Z/fgOxHSxxusGHogsRfxNq1vyAwxSC+EVyDg==
+concurrently@^9.0.0:
+  version "9.0.0"
+  resolved "https://registry.yarnpkg.com/concurrently/-/concurrently-9.0.0.tgz#b74e85bfbed9b920c54128f8cf7f91f23cc19112"
+  integrity sha512-iAxbsDeUkn8E/4+QalT7T3WvlyTfmsoez+19lbbcsxZdOEMfBukd8LA30KYez2UR5xkKFzbcqXIZy5RisCbaxw==
   dependencies:
     chalk "^4.1.2"
-    date-fns "^2.30.0"
     lodash "^4.17.21"
     rxjs "^7.8.1"
     shell-quote "^1.8.1"
-    spawn-command "0.0.2"
     supports-color "^8.1.1"
     tree-kill "^1.2.2"
     yargs "^17.7.2"
@@ -3884,13 +3882,6 @@ dag-map@^2.0.2:
   resolved "https://registry.yarnpkg.com/dag-map/-/dag-map-2.0.2.tgz#9714b472de82a1843de2fba9b6876938cab44c68"
   integrity sha512-xnsprIzYuDeiyu5zSKwilV/ajRHxnoMlAhEREfyfTgTSViMVY2fGP1ZcHJbtwup26oCkofySU/m6oKJ3HrkW7w==
 
-date-fns@^2.30.0:
-  version "2.30.0"
-  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-2.30.0.tgz#f367e644839ff57894ec6ac480de40cae4b0f4d0"
-  integrity sha512-fnULvOpxnC5/Vg3NCiWelDsLiUc9bRwAPs/+LfTLNvetFCtCTN+yQz15C/fs4AwX1R9K5GLtLfn8QW+dWisaAw==
-  dependencies:
-    "@babel/runtime" "^7.21.0"
-
 date-fns@^3.6.0:
   version "3.6.0"
   resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-3.6.0.tgz#f20ca4fe94f8b754951b24240676e8618c0206bf"
@@ -9493,11 +9484,6 @@ spawn-args@^0.2.0:
   resolved "https://registry.yarnpkg.com/spawn-args/-/spawn-args-0.2.0.tgz#fb7d0bd1d70fd4316bd9e3dec389e65f9d6361bb"
   integrity sha512-73BoniQDcRWgnLAf/suKH6V5H54gd1KLzwYN9FB6J/evqTV33htH9xwV/4BHek+++jzxpVlZQKKZkqstPQPmQg==
 
-spawn-command@0.0.2:
-  version "0.0.2"
-  resolved "https://registry.yarnpkg.com/spawn-command/-/spawn-command-0.0.2.tgz#9544e1a43ca045f8531aac1a48cb29bdae62338e"
-  integrity sha512-zC8zGoGkmc8J9ndvml8Xksr1Amk9qBujgbF0JAIWO7kXr43w0h/0GJNM/Vustixu+YE8N/MTrQ7N31FvHUACxQ==
-
 spdx-correct@^3.0.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-3.2.0.tgz#4f5ab0668f0059e34f9c00dce331784a12de4e9c"